Spektrum H6160 HV High Speed Heli Cyclic Metal Gear Servo This is the Spektrum H6160 High Speed Voltage Heli Cyclic Metal Gear Servo.Features:HV compatible Great choice for a low cost cyclic servo for 550-700 sized helis Metal gears and metal center section case Standard sizeIncludes:One Spektrum H6160 High Speed Voltage Heli Cyclic Metal Gear Servo